Research progress on effect factors of secondary metabolites content in callus The factors influencing rural household firewood consumption: a theoretical model and empirical research of a typical area in Chongqing Municipality Spatial distribution of soil nitrogen in an urban-rural fringe and its influencing factors The process of energy-related carbon emissions and influencing mechanism research in Xinjiang Assessing relative contributions of various influencing factors to soil organic carbon in aerially-seeded Pinus massoniana plantations Analysis of isolated wetland spatial distribution and factors influencing it in the Sanjiang Plain, China Analysis of factors that influence forest vegetation carbon storage by using the VAR model: a case study in Shanxi Province A Study on Seed Germ ina tion and Seedling Growth of Rhododendrons Influencing factors of efficient and rapid propagation in vitro of Bromeliads Factors of Nicotine Synthesis and Metabolism in Nicotiana tabacum L. Photosynthetic Characteristics of Lespedeza tomentosa and Influencing Factors Study on influencing factors of valid patents of compound traditional Chinese medicines for cardiovascular and cerebrovascular diseases on base of regression analysis Research progresses in carbon budget and carbon cycle of the coastal salt marshes in China